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<div class="title">S110_nRF51822/Source/ble/app_timer.c</div>  </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> * The information contained herein is property of Nordic Semiconductor ASA.</span>
<a name="l00004"></a>00004 <span class="comment"> * Terms and conditions of usage are described in detail in NORDIC</span>
<a name="l00005"></a>00005 <span class="comment"> * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * Licensees are granted free, non-transferable use of the information. NO</span>
<a name="l00008"></a>00008 <span class="comment"> * WARRANTY of ANY KIND is provided. This heading must NOT be removed from</span>
<a name="l00009"></a>00009 <span class="comment"> * the file.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * $LastChangedRevision$</span>
<a name="l00012"></a>00012 <span class="comment"> */</span>
<a name="l00013"></a>00013 
<a name="l00014"></a>00014 <span class="preprocessor">#include &quot;<a class="code" href="app__timer_8h.html">app_timer.h</a>&quot;</span>
<a name="l00015"></a>00015 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<a name="l00016"></a>00016 <span class="preprocessor">#include &lt;stdint.h&gt;</span>
<a name="l00017"></a>00017 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00018"></a>00018 <span class="preprocessor">#include &quot;<a class="code" href="nrf__assert_8h.html" title="Utilities for verifying program logic.">nrf_assert.h</a>&quot;</span>
<a name="l00019"></a>00019 <span class="preprocessor">#include &quot;nrf_soc.h&quot;</span>
<a name="l00020"></a>00020 <span class="preprocessor">#include &quot;<a class="code" href="ble__sdk__util_8h.html">ble_sdk_util.h</a>&quot;</span>
<a name="l00021"></a>00021 
<a name="l00022"></a>00022 
<a name="l00023"></a>00023 <span class="preprocessor">#define RTC_CLOCK_FREQ  32768</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#define MAX_RTC_COUNTER 0xFFFFFF</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span>
<a name="l00027"></a>00027 <span class="preprocessor">#define RTC_PRESCALER   (ROUNDED_DIV(RTC_CLOCK_FREQ, APP_TIMER_FREQ) - 1)</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span>    
<a name="l00038"></a>00038 <span class="preprocessor">#define RTC_COUNTER_COMPUTE(DELAY_MS)\</span>
<a name="l00039"></a>00039 <span class="preprocessor">    ROUNDED_DIV((uint64_t)(DELAY_MS) * RTC_CLOCK_FREQ, 1000 * (RTC_PRESCALER + 1))</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>
<a name="l00042"></a>00042 <span class="preprocessor">#define TIMER_QUEUE_EMPTY()     (sp_timer_queue == NULL)</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span>
<a name="l00045"></a>00045 <span class="preprocessor">#define TIMER_QUEUE_NOT_EMPTY() (sp_timer_queue != NULL)</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span>
<a name="l00051"></a>00051 <span class="keyword">typedef</span> <span class="keyword">struct </span>app_timer_s
<a name="l00052"></a>00052 {
<a name="l00053"></a>00053     <a class="code" href="group__app__timer.html#gaae9566b4f8c39bd6e7b364940ca1b73b" title="Available timer modes.">app_timer_mode_t</a>              mode;                 
<a name="l00054"></a>00054     app_timer_id_t                timer_id;             
<a name="l00055"></a>00055     <a class="code" href="group__app__timer.html#ga0586b27407494731cad5b72b12aa5bfe" title="Application timeout handler type.">app_timer_timeout_handler_t</a>   timeout_handler;      
<a name="l00056"></a>00056     uint32_t                      time_units_left;      
<a name="l00057"></a>00057     uint32_t                      time_units_timeout;   
<a name="l00058"></a>00058     uint8_t                       priority;             
<a name="l00059"></a>00059     <span class="keyword">volatile</span> <span class="keyword">struct </span>app_timer_s * p_next;               
<a name="l00060"></a>00060 } app_timer_t;
<a name="l00061"></a>00061 
<a name="l00063"></a>00063 <span class="keyword">static</span> <span class="keyword">volatile</span> app_timer_t s_timer_queue_mem[APP_TIMER_LAST_ELEMENT];
<a name="l00064"></a>00064 
<a name="l00066"></a>00066 <span class="keyword">static</span> <span class="keyword">volatile</span> app_timer_t * <span class="keyword">volatile</span> sp_timer_queue = NULL;
<a name="l00067"></a>00067 
<a name="l00070"></a>00070 <span class="keyword">static</span> <a class="code" href="group__app__timer.html#gaad3eca6b3b4a47f9a4211ced6e4a7d4b" title="Function pointer type for letting the application control how or when timeout handlers are executed...">app_timer_issue_evt_func_t</a> s_issue_evt_func = NULL;
<a name="l00071"></a>00071 
<a name="l00072"></a>00072 
<a name="l00073"></a>00073 <span class="keyword">static</span> <span class="keywordtype">void</span> queue_add(<span class="keyword">const</span> app_timer_t * timer);
<a name="l00074"></a>00074 <span class="keyword">static</span> <span class="keywordtype">void</span> queue_remove_first(<span class="keywordtype">void</span>);
<a name="l00075"></a>00075 <span class="keyword">static</span> <span class="keywordtype">void</span> timers_update(uint32_t elapsed_time_units);
<a name="l00076"></a>00076 
<a name="l00077"></a>00077 
<a name="l00078"></a>00078 <span class="keyword">static</span> uint32_t rtc_init(<span class="keywordtype">void</span>)
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080     uint32_t err_code;
<a name="l00081"></a>00081     uint32_t per_rdy;
<a name="l00082"></a>00082 
<a name="l00083"></a>00083     <span class="comment">// Power on RTC1</span>
<a name="l00084"></a>00084     err_code = <a class="code" href="group__nrf__soc__api.html#ga4070a6cd178fce204f58a1bf6e3fc954" title="Sets bits in the NRF_POWER-&gt;PERPOWER register.">nrf_power_perpower_set</a>(POWER_PERPOWER_RTC1_Msk);
<a name="l00085"></a>00085     <span class="keywordflow">if</span> (err_code != <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>)
<a name="l00086"></a>00086     {
<a name="l00087"></a>00087         <span class="keywordflow">return</span> err_code;
<a name="l00088"></a>00088     }
<a name="l00089"></a>00089 
<a name="l00090"></a>00090     <span class="keywordflow">do</span>
<a name="l00091"></a>00091     {
<a name="l00092"></a>00092         err_code = <a class="code" href="group__nrf__soc__api.html#gabaf2aa42d1d287d9d4fd2b00ecda1da7" title="Get contents of NRF_POWER-&gt;PERRDY register, indicates which peripherals are powered on/off...">nrf_power_perrdy_get</a>(&amp;per_rdy);
<a name="l00093"></a>00093         <span class="keywordflow">if</span> (err_code != <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>)
<a name="l00094"></a>00094         {
<a name="l00095"></a>00095             <span class="keywordflow">return</span> err_code;
<a name="l00096"></a>00096         }
<a name="l00097"></a>00097     } <span class="keywordflow">while</span> ((per_rdy &amp; POWER_PERRDY_RTC1_Msk) == 0);
<a name="l00098"></a>00098     
<a name="l00099"></a>00099     <span class="comment">// Initialize RTC</span>
<a name="l00100"></a>00100     NRF_RTC1-&gt;PRESCALER = RTC_PRESCALER;
<a name="l00101"></a>00101     NRF_RTC1-&gt;CC[0]     = MAX_RTC_COUNTER;
<a name="l00102"></a>00102     NRF_RTC1-&gt;EVTENSET  = RTC_EVTENSET_COMPARE0_Msk;
<a name="l00103"></a>00103     NRF_RTC1-&gt;INTENSET  = RTC_INTENSET_COMPARE0_Msk;
<a name="l00104"></a>00104 
<a name="l00105"></a>00105     <span class="comment">// Enable RTC event interrupt</span>
<a name="l00106"></a>00106     err_code = <a class="code" href="group__nrf__soc__api.html#ga444796a3a1fc91db087ceebcd92d6561" title="Clear Pending Interrupt.">nrf_nvic_ClearPendingIRQ</a>(RTC1_IRQn);
<a name="l00107"></a>00107     <span class="keywordflow">if</span> (err_code != <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>)
<a name="l00108"></a>00108     {
<a name="l00109"></a>00109         <span class="keywordflow">return</span> err_code;
<a name="l00110"></a>00110     }
<a name="l00111"></a>00111     err_code = <a class="code" href="group__nrf__soc__api.html#gad1a939313c86ac881a0b1043715ef475" title="Set Interrupt Priority.">nrf_nvic_SetPriority</a>(RTC1_IRQn, NRF_APP_PRIORITY_LOW);
<a name="l00112"></a>00112     <span class="keywordflow">if</span> (err_code != <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>)
<a name="l00113"></a>00113     {
<a name="l00114"></a>00114         <span class="keywordflow">return</span> err_code;
<a name="l00115"></a>00115     }
<a name="l00116"></a>00116     err_code = <a class="code" href="group__nrf__soc__api.html#ga624ecb710ec5cdaf22893608d55c6f3a" title="Enable External Interrupt.">nrf_nvic_EnableIRQ</a>(RTC1_IRQn);
<a name="l00117"></a>00117     <span class="keywordflow">if</span> (err_code != <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>)
<a name="l00118"></a>00118     {
<a name="l00119"></a>00119         <span class="keywordflow">return</span> err_code;
<a name="l00120"></a>00120     }
<a name="l00121"></a>00121     
<a name="l00122"></a>00122     <span class="keywordflow">return</span> <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>;
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124 
<a name="l00125"></a>00125 
<a name="l00126"></a>00126 <span class="keyword">static</span> uint32_t rtc_counter_get(<span class="keywordtype">void</span>)
<a name="l00127"></a>00127 {
<a name="l00128"></a>00128     <span class="keywordflow">return</span> (uint32_t)NRF_RTC1-&gt;COUNTER;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 
<a name="l00131"></a>00131 
<a name="l00132"></a>00132 <span class="keyword">static</span> <span class="keywordtype">void</span> rtc_comparereg_update(uint32_t time_units)
<a name="l00133"></a>00133 {
<a name="l00134"></a>00134     <a class="code" href="nrf__assert_8h.html#a28301f76c53b643912da7c538f74e2c6" title="Assert empty when disabled.">ASSERT</a>(time_units &lt; MAX_RTC_COUNTER);
<a name="l00135"></a>00135 
<a name="l00136"></a>00136     <span class="keywordflow">if</span> (time_units &gt; NRF_RTC1-&gt;COUNTER)
<a name="l00137"></a>00137     {
<a name="l00138"></a>00138         NRF_RTC1-&gt;CC[0] = time_units;
<a name="l00139"></a>00139     }
<a name="l00140"></a>00140     <span class="keywordflow">else</span>
<a name="l00141"></a>00141     {
<a name="l00142"></a>00142         <span class="comment">// Timeout should already have occured</span>
<a name="l00143"></a>00143         NRF_RTC1-&gt;CC[0] = NRF_RTC1-&gt;COUNTER + 1;
<a name="l00144"></a>00144     }
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146 
<a name="l00147"></a>00147 
<a name="l00148"></a>00148 <span class="keyword">static</span> <span class="keywordtype">void</span> rtc_start(<span class="keywordtype">void</span>)
<a name="l00149"></a>00149 {
<a name="l00150"></a>00150     NRF_RTC1-&gt;TASKS_CLEAR = 1;
<a name="l00151"></a>00151     NRF_RTC1-&gt;TASKS_START = 1;
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153 
<a name="l00154"></a>00154 
<a name="l00155"></a>00155 <span class="keyword">static</span> <span class="keywordtype">void</span> rtc_stop(<span class="keywordtype">void</span>)
<a name="l00156"></a>00156 {
<a name="l00157"></a>00157     NRF_RTC1-&gt;TASKS_STOP  = 1;
<a name="l00158"></a>00158     NRF_RTC1-&gt;TASKS_CLEAR = 1;
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160 
<a name="l00161"></a>00161 
<a name="l00164"></a>00164 <span class="keywordtype">void</span> RTC1_IRQHandler()
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166     <span class="keywordflow">if</span> (
<a name="l00167"></a>00167         (NRF_RTC1-&gt;EVENTS_COMPARE[0] != 0) 
<a name="l00168"></a>00168         &amp;&amp; 
<a name="l00169"></a>00169         ((NRF_RTC1-&gt;INTENSET &amp; RTC_INTENSET_COMPARE0_Msk) != 0)
<a name="l00170"></a>00170     )
<a name="l00171"></a>00171     {
<a name="l00172"></a>00172         <span class="comment">// Clear event</span>
<a name="l00173"></a>00173         NRF_RTC1-&gt;EVENTS_COMPARE[0] = 0;
<a name="l00174"></a>00174         
<a name="l00175"></a>00175         <span class="comment">// Stop timer</span>
<a name="l00176"></a>00176         NRF_RTC1-&gt;TASKS_CLEAR = 1;
<a name="l00177"></a>00177 
<a name="l00178"></a>00178         <span class="comment">// Call event handler</span>
<a name="l00179"></a>00179         timers_update(NRF_RTC1-&gt;CC[0]);
<a name="l00180"></a>00180     }
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182 
<a name="l00183"></a>00183 
<a name="l00184"></a><a class="code" href="group__app__timer.html#ga4e1da5a2f64ee78ee97f7422ea97e439">00184</a> uint32_t <a class="code" href="group__app__timer.html#ga4e1da5a2f64ee78ee97f7422ea97e439" title="Initializes the timer module.">app_timer_init</a>(<a class="code" href="group__app__timer.html#gaad3eca6b3b4a47f9a4211ced6e4a7d4b" title="Function pointer type for letting the application control how or when timeout handlers are executed...">app_timer_issue_evt_func_t</a> issue_evt_func)
<a name="l00185"></a>00185 {
<a name="l00186"></a>00186     s_issue_evt_func = issue_evt_func;
<a name="l00187"></a>00187     <span class="keywordflow">return</span> rtc_init();
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189 
<a name="l00190"></a>00190 
<a name="l00191"></a><a class="code" href="group__app__timer.html#gad1b89d22873086f82a79a8525f18b9fc">00191</a> <span class="keywordtype">bool</span> <a class="code" href="group__app__timer.html#gad1b89d22873086f82a79a8525f18b9fc" title="Checks if the specified timer is running.">app_timer_is_running</a>(app_timer_id_t timer_id)
<a name="l00192"></a>00192 {
<a name="l00193"></a>00193     <span class="keywordtype">bool</span>                   timer_found = <span class="keyword">false</span>;
<a name="l00194"></a>00194     <span class="keyword">volatile</span> app_timer_t * p_queue_entry;
<a name="l00195"></a>00195     
<a name="l00196"></a>00196     <a class="code" href="group__ble__sdk__lib__util.html#ga61149a977f6ebdaeb8bdeed626dd9392" title="Macro for entering a critical region.">CRITICAL_REGION_ENTER</a>();
<a name="l00197"></a>00197     
<a name="l00198"></a>00198     p_queue_entry = sp_timer_queue;
<a name="l00199"></a>00199     <span class="keywordflow">while</span> (p_queue_entry != NULL)
<a name="l00200"></a>00200     {
<a name="l00201"></a>00201         <span class="keywordflow">if</span> (p_queue_entry-&gt;timer_id == timer_id)
<a name="l00202"></a>00202         {
<a name="l00203"></a>00203            timer_found = <span class="keyword">true</span>;
<a name="l00204"></a>00204            <span class="keywordflow">break</span>;
<a name="l00205"></a>00205         }
<a name="l00206"></a>00206         p_queue_entry = p_queue_entry-&gt;p_next;
<a name="l00207"></a>00207     }
<a name="l00208"></a>00208     
<a name="l00209"></a>00209     <a class="code" href="group__ble__sdk__lib__util.html#ga854878240b628e978f760f75aca4e1cc" title="Macro for leaving a critical region.">CRITICAL_REGION_EXIT</a>();
<a name="l00210"></a>00210     
<a name="l00211"></a>00211     <span class="keywordflow">return</span> timer_found;
<a name="l00212"></a>00212 }
<a name="l00213"></a>00213 
<a name="l00214"></a>00214 
<a name="l00215"></a><a class="code" href="group__app__timer.html#ga54651d3dc5266bd7541b80918527b060">00215</a> uint32_t <a class="code" href="group__app__timer.html#ga54651d3dc5266bd7541b80918527b060" title="Starts a timer.">app_timer_start</a>(app_timer_id_t              timer_id, 
<a name="l00216"></a>00216                          <a class="code" href="group__app__timer.html#ga0586b27407494731cad5b72b12aa5bfe" title="Application timeout handler type.">app_timer_timeout_handler_t</a> timeout_handler,
<a name="l00217"></a>00217                          uint32_t                    timeout_ms, 
<a name="l00218"></a>00218                          <a class="code" href="group__app__timer.html#gaae9566b4f8c39bd6e7b364940ca1b73b" title="Available timer modes.">app_timer_mode_t</a>            mode, 
<a name="l00219"></a>00219                          uint8_t                     priority)
<a name="l00220"></a>00220 {
<a name="l00221"></a>00221     uint32_t err_code;
<a name="l00222"></a>00222     
<a name="l00223"></a>00223     <span class="comment">// Stop timer if running</span>
<a name="l00224"></a>00224     <a class="code" href="group__app__timer.html#ga4112ddbc75deb5c4d5db7c8afb1f5d8a" title="Stops the specified timer.">app_timer_stop</a>(timer_id);
<a name="l00225"></a>00225 
<a name="l00226"></a>00226     <span class="keywordflow">if</span> (timeout_ms &gt; 0)
<a name="l00227"></a>00227     {
<a name="l00228"></a>00228         <span class="comment">// Start timer</span>
<a name="l00229"></a>00229         app_timer_t timer;
<a name="l00230"></a>00230         uint32_t    rtc_cc_reg = RTC_COUNTER_COMPUTE(timeout_ms);
<a name="l00231"></a>00231         
<a name="l00232"></a>00232         timer.mode               = mode;
<a name="l00233"></a>00233         timer.timer_id           = timer_id;
<a name="l00234"></a>00234         timer.timeout_handler    = timeout_handler;
<a name="l00235"></a>00235         timer.time_units_left    = rtc_cc_reg + rtc_counter_get();
<a name="l00236"></a>00236         timer.time_units_timeout = rtc_cc_reg;
<a name="l00237"></a>00237         timer.priority           = priority;
<a name="l00238"></a>00238         
<a name="l00239"></a>00239         <a class="code" href="group__ble__sdk__lib__util.html#ga61149a977f6ebdaeb8bdeed626dd9392" title="Macro for entering a critical region.">CRITICAL_REGION_ENTER</a>();
<a name="l00240"></a>00240         queue_add(&amp;timer);
<a name="l00241"></a>00241         <a class="code" href="group__ble__sdk__lib__util.html#ga854878240b628e978f760f75aca4e1cc" title="Macro for leaving a critical region.">CRITICAL_REGION_EXIT</a>();
<a name="l00242"></a>00242         
<a name="l00243"></a>00243         err_code = <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>;
<a name="l00244"></a>00244     }
<a name="l00245"></a>00245     <span class="keywordflow">else</span>
<a name="l00246"></a>00246     {
<a name="l00247"></a>00247         <span class="keywordflow">if</span> (mode == APP_TIMER_MODE_SINGLE_SHOT)
<a name="l00248"></a>00248         {
<a name="l00249"></a>00249             <span class="comment">// Execute timeout handler immediately, either by calling it directly,</span>
<a name="l00250"></a>00250             <span class="comment">// or through the &quot;issue&quot; function.</span>
<a name="l00251"></a>00251             <span class="keywordflow">if</span> (s_issue_evt_func != NULL)
<a name="l00252"></a>00252             {
<a name="l00253"></a>00253                 err_code = (*s_issue_evt_func)(timer_id, timeout_handler, priority);
<a name="l00254"></a>00254             }
<a name="l00255"></a>00255             <span class="keywordflow">else</span>
<a name="l00256"></a>00256             {
<a name="l00257"></a>00257                 (*timeout_handler)(timer_id);
<a name="l00258"></a>00258                 err_code = <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>;
<a name="l00259"></a>00259             }
<a name="l00260"></a>00260         }
<a name="l00261"></a>00261         <span class="keywordflow">else</span>
<a name="l00262"></a>00262         {
<a name="l00263"></a>00263             <span class="comment">// Repeated timer with timout equal 0 not allowed</span>
<a name="l00264"></a>00264             err_code = <a class="code" href="group__nrf__error.html#ga0a5831cf5092e0dd43a01869676ee076" title="Invalid Parameter.">NRF_ERROR_INVALID_PARAM</a>;
<a name="l00265"></a>00265         }
<a name="l00266"></a>00266     }
<a name="l00267"></a>00267         
<a name="l00268"></a>00268     <span class="keywordflow">return</span> err_code;
<a name="l00269"></a>00269 }
<a name="l00270"></a>00270 
<a name="l00271"></a>00271 
<a name="l00272"></a><a class="code" href="group__app__timer.html#ga4112ddbc75deb5c4d5db7c8afb1f5d8a">00272</a> <span class="keywordtype">void</span> <a class="code" href="group__app__timer.html#ga4112ddbc75deb5c4d5db7c8afb1f5d8a" title="Stops the specified timer.">app_timer_stop</a>(app_timer_id_t timer_id)
<a name="l00273"></a>00273 {
<a name="l00274"></a>00274     <a class="code" href="group__ble__sdk__lib__util.html#ga61149a977f6ebdaeb8bdeed626dd9392" title="Macro for entering a critical region.">CRITICAL_REGION_ENTER</a>();
<a name="l00275"></a>00275     
<a name="l00276"></a>00276     <span class="keywordflow">if</span> (TIMER_QUEUE_NOT_EMPTY())
<a name="l00277"></a>00277     {
<a name="l00278"></a>00278         <span class="keyword">volatile</span> app_timer_t * p_queue_entry = sp_timer_queue;
<a name="l00279"></a>00279         
<a name="l00280"></a>00280         <span class="keywordflow">if</span> (p_queue_entry-&gt;timer_id == timer_id)
<a name="l00281"></a>00281         {
<a name="l00282"></a>00282             <span class="comment">// Match on first element</span>
<a name="l00283"></a>00283             sp_timer_queue = p_queue_entry-&gt;p_next;
<a name="l00284"></a>00284             <span class="keywordflow">if</span> (sp_timer_queue == NULL)
<a name="l00285"></a>00285             {
<a name="l00286"></a>00286                 rtc_stop();
<a name="l00287"></a>00287             }
<a name="l00288"></a>00288             <span class="keywordflow">else</span>
<a name="l00289"></a>00289             {
<a name="l00290"></a>00290                 rtc_comparereg_update(sp_timer_queue-&gt;time_units_left);
<a name="l00291"></a>00291             }
<a name="l00292"></a>00292         }
<a name="l00293"></a>00293         <span class="keywordflow">else</span>
<a name="l00294"></a>00294         {   
<a name="l00295"></a>00295             <span class="keywordflow">while</span> (p_queue_entry-&gt;p_next != NULL)
<a name="l00296"></a>00296             {
<a name="l00297"></a>00297                 <span class="keywordflow">if</span> (p_queue_entry-&gt;p_next-&gt;timer_id == timer_id)
<a name="l00298"></a>00298                 {
<a name="l00299"></a>00299                    <span class="comment">// Match in middle or end of queue</span>
<a name="l00300"></a>00300                    p_queue_entry-&gt;p_next = p_queue_entry-&gt;p_next-&gt;p_next;
<a name="l00301"></a>00301                    <span class="keywordflow">break</span>;
<a name="l00302"></a>00302                 }
<a name="l00303"></a>00303                 p_queue_entry = p_queue_entry-&gt;p_next;
<a name="l00304"></a>00304             }
<a name="l00305"></a>00305         }
<a name="l00306"></a>00306     }
<a name="l00307"></a>00307     
<a name="l00308"></a>00308     <a class="code" href="group__ble__sdk__lib__util.html#ga854878240b628e978f760f75aca4e1cc" title="Macro for leaving a critical region.">CRITICAL_REGION_EXIT</a>();
<a name="l00309"></a>00309 }
<a name="l00310"></a>00310 
<a name="l00311"></a>00311 
<a name="l00317"></a>00317 <span class="keyword">static</span> <span class="keywordtype">void</span> timers_update(uint32_t elapsed_time_units)
<a name="l00318"></a>00318 {
<a name="l00319"></a>00319     <span class="keyword">volatile</span> app_timer_t * p_queue_entry;
<a name="l00320"></a>00320     
<a name="l00321"></a>00321     <span class="comment">// NOTE: This function will be called from the RTC interrupt handler, which runs in</span>
<a name="l00322"></a>00322     <span class="comment">//       App Low interrupt level. If starting timers from App High is to be supported, the</span>
<a name="l00323"></a>00323     <span class="comment">//       list handling in this function needs to be protected by a critical region.</span>
<a name="l00324"></a>00324 
<a name="l00325"></a>00325     <a class="code" href="nrf__assert_8h.html#a28301f76c53b643912da7c538f74e2c6" title="Assert empty when disabled.">ASSERT</a>(TIMER_QUEUE_NOT_EMPTY());
<a name="l00326"></a>00326 
<a name="l00327"></a>00327     <span class="comment">// Update timer queue</span>
<a name="l00328"></a>00328     p_queue_entry = sp_timer_queue;
<a name="l00329"></a>00329     <span class="keywordflow">while</span> (p_queue_entry != NULL)
<a name="l00330"></a>00330     {
<a name="l00331"></a>00331         <span class="keywordflow">if</span> (p_queue_entry-&gt;time_units_left &gt; elapsed_time_units)
<a name="l00332"></a>00332         {
<a name="l00333"></a>00333             p_queue_entry-&gt;time_units_left -= elapsed_time_units;
<a name="l00334"></a>00334         }
<a name="l00335"></a>00335         <span class="keywordflow">else</span>
<a name="l00336"></a>00336         {
<a name="l00337"></a>00337             p_queue_entry-&gt;time_units_left = 0;
<a name="l00338"></a>00338         }
<a name="l00339"></a>00339         p_queue_entry = p_queue_entry-&gt;p_next;
<a name="l00340"></a>00340     }
<a name="l00341"></a>00341     
<a name="l00342"></a>00342     <span class="comment">// Handle timeouts</span>
<a name="l00343"></a>00343     <span class="comment">// NOTE: The timer queue is sorted, so if first timer in queue has not expired, none have.</span>
<a name="l00344"></a>00344     <span class="keywordflow">while</span> (TIMER_QUEUE_NOT_EMPTY() &amp;&amp; (sp_timer_queue-&gt;time_units_left == 0))
<a name="l00345"></a>00345     {
<a name="l00346"></a>00346         <span class="comment">// Execute timeout handler, either by calling it directly, or through the &quot;issue&quot; function</span>
<a name="l00347"></a>00347         <span class="keywordflow">if</span> (s_issue_evt_func != NULL)
<a name="l00348"></a>00348         {
<a name="l00349"></a>00349             uint32_t               err_code;
<a name="l00350"></a>00350             <span class="keyword">volatile</span> app_timer_t * p_timer = sp_timer_queue;
<a name="l00351"></a>00351             
<a name="l00352"></a>00352             err_code = (*s_issue_evt_func)(p_timer-&gt;timer_id,
<a name="l00353"></a>00353                                            p_timer-&gt;timeout_handler,
<a name="l00354"></a>00354                                            p_timer-&gt;priority);
<a name="l00355"></a>00355             <span class="keywordflow">if</span> (err_code != <a class="code" href="group__nrf__error.html#ga7e6367efeaac363d8cf024940b4ec123" title="Successful command.">NRF_SUCCESS</a>)
<a name="l00356"></a>00356             {
<a name="l00357"></a>00357                 <a class="code" href="nrf__assert_8h.html#a28301f76c53b643912da7c538f74e2c6" title="Assert empty when disabled.">ASSERT</a>(<span class="keyword">false</span>);
<a name="l00358"></a>00358             }
<a name="l00359"></a>00359         }
<a name="l00360"></a>00360         <span class="keywordflow">else</span>
<a name="l00361"></a>00361         {
<a name="l00362"></a>00362             <span class="keyword">volatile</span> app_timer_t * p_timer = sp_timer_queue;
<a name="l00363"></a>00363             
<a name="l00364"></a>00364             (*p_timer-&gt;timeout_handler)(p_timer-&gt;timer_id);
<a name="l00365"></a>00365         }
<a name="l00366"></a>00366 
<a name="l00367"></a>00367         <span class="keywordflow">if</span> (sp_timer_queue-&gt;mode == APP_TIMER_MODE_REPEATED)
<a name="l00368"></a>00368         {   
<a name="l00369"></a>00369             <span class="comment">// Repeated timer, restart</span>
<a name="l00370"></a>00370             app_timer_t timer;
<a name="l00371"></a>00371             
<a name="l00372"></a>00372             timer.mode               = sp_timer_queue-&gt;mode;
<a name="l00373"></a>00373             timer.timer_id           = sp_timer_queue-&gt;timer_id;
<a name="l00374"></a>00374             timer.timeout_handler    = sp_timer_queue-&gt;timeout_handler;
<a name="l00375"></a>00375             timer.time_units_left    = sp_timer_queue-&gt;time_units_timeout;
<a name="l00376"></a>00376             timer.time_units_timeout = sp_timer_queue-&gt;time_units_timeout;
<a name="l00377"></a>00377             timer.priority           = sp_timer_queue-&gt;priority;
<a name="l00378"></a>00378             
<a name="l00379"></a>00379             queue_remove_first();
<a name="l00380"></a>00380             queue_add(&amp;timer);
<a name="l00381"></a>00381         }
<a name="l00382"></a>00382         <span class="keywordflow">else</span>
<a name="l00383"></a>00383         {
<a name="l00384"></a>00384             <span class="comment">// Stop timer</span>
<a name="l00385"></a>00385             queue_remove_first();
<a name="l00386"></a>00386         }
<a name="l00387"></a>00387     }
<a name="l00388"></a>00388 
<a name="l00389"></a>00389     <span class="keywordflow">if</span> (TIMER_QUEUE_EMPTY())
<a name="l00390"></a>00390     {
<a name="l00391"></a>00391         rtc_stop();
<a name="l00392"></a>00392     }  
<a name="l00393"></a>00393 }
<a name="l00394"></a>00394 
<a name="l00395"></a>00395 
<a name="l00400"></a>00400 <span class="keyword">static</span> <span class="keywordtype">void</span> queue_add(<span class="keyword">const</span> app_timer_t *p_timer)
<a name="l00401"></a>00401 {
<a name="l00402"></a>00402     <span class="keyword">volatile</span> app_timer_t * p_new_timer;
<a name="l00403"></a>00403     
<a name="l00404"></a>00404     <span class="comment">// Allocate new timer</span>
<a name="l00405"></a>00405     p_new_timer  = &amp;s_timer_queue_mem[p_timer-&gt;timer_id];
<a name="l00406"></a>00406     *p_new_timer = *p_timer;
<a name="l00407"></a>00407     
<a name="l00408"></a>00408     <span class="comment">// Insert timer in sorted timer queue</span>
<a name="l00409"></a>00409     <span class="keywordflow">if</span> (TIMER_QUEUE_EMPTY())
<a name="l00410"></a>00410     {
<a name="l00411"></a>00411         <span class="comment">// Insert timer as the only timer in queue</span>
<a name="l00412"></a>00412         sp_timer_queue         = p_new_timer;
<a name="l00413"></a>00413         sp_timer_queue-&gt;p_next = NULL;
<a name="l00414"></a>00414 
<a name="l00415"></a>00415         rtc_comparereg_update(p_new_timer-&gt;time_units_left);
<a name="l00416"></a>00416         rtc_start();
<a name="l00417"></a>00417     }
<a name="l00418"></a>00418     <span class="keywordflow">else</span>
<a name="l00419"></a>00419     {
<a name="l00420"></a>00420         <span class="keyword">volatile</span> app_timer_t * p_queue_entry = sp_timer_queue;
<a name="l00421"></a>00421         
<a name="l00422"></a>00422         <span class="keywordflow">if</span> (p_new_timer-&gt;time_units_left &lt; p_queue_entry-&gt;time_units_left)
<a name="l00423"></a>00423         {
<a name="l00424"></a>00424           <span class="comment">// Insert timer at the beginning of the queue</span>
<a name="l00425"></a>00425           sp_timer_queue         = p_new_timer;
<a name="l00426"></a>00426           sp_timer_queue-&gt;p_next = p_queue_entry;
<a name="l00427"></a>00427           
<a name="l00428"></a>00428           rtc_comparereg_update(p_new_timer-&gt;time_units_left);
<a name="l00429"></a>00429         }
<a name="l00430"></a>00430         <span class="keywordflow">else</span>
<a name="l00431"></a>00431         {
<a name="l00432"></a>00432             <span class="keywordflow">while</span> (p_queue_entry-&gt;p_next != NULL)
<a name="l00433"></a>00433             {
<a name="l00434"></a>00434                 <span class="keywordflow">if</span> (p_new_timer-&gt;time_units_left &lt; p_queue_entry-&gt;p_next-&gt;time_units_left)
<a name="l00435"></a>00435                 {
<a name="l00436"></a>00436                     <span class="comment">// Insert timer in middle of queue</span>
<a name="l00437"></a>00437                     p_new_timer-&gt;p_next   = p_queue_entry-&gt;p_next;
<a name="l00438"></a>00438                     p_queue_entry-&gt;p_next = p_new_timer;
<a name="l00439"></a>00439                     
<a name="l00440"></a>00440                     <span class="keywordflow">break</span>;
<a name="l00441"></a>00441                 }
<a name="l00442"></a>00442                 p_queue_entry = p_queue_entry-&gt;p_next;
<a name="l00443"></a>00443             }
<a name="l00444"></a>00444             
<a name="l00445"></a>00445             <span class="comment">// Check if new timer is last</span>
<a name="l00446"></a>00446             <span class="keywordflow">if</span> (p_queue_entry-&gt;p_next == NULL)
<a name="l00447"></a>00447             {
<a name="l00448"></a>00448                 <span class="comment">// Insert timer at the end of the queue</span>
<a name="l00449"></a>00449                 p_queue_entry-&gt;p_next = p_new_timer;
<a name="l00450"></a>00450                 p_new_timer-&gt;p_next   = NULL;
<a name="l00451"></a>00451             }
<a name="l00452"></a>00452         }
<a name="l00453"></a>00453     }
<a name="l00454"></a>00454 }
<a name="l00455"></a>00455 
<a name="l00456"></a>00456 
<a name="l00459"></a>00459 <span class="keyword">static</span> <span class="keywordtype">void</span> queue_remove_first(<span class="keywordtype">void</span>)
<a name="l00460"></a>00460 {
<a name="l00461"></a>00461     sp_timer_queue = sp_timer_queue-&gt;p_next;
<a name="l00462"></a>00462     <span class="keywordflow">if</span> (TIMER_QUEUE_NOT_EMPTY())
<a name="l00463"></a>00463     {
<a name="l00464"></a>00464         rtc_comparereg_update(sp_timer_queue-&gt;time_units_left);
<a name="l00465"></a>00465     }
<a name="l00466"></a>00466 }
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